257831055 has 12 divisors (see below), whose sum is σ = 446907240. Its totient is φ = 137509872.

The previous prime is 257831051. The next prime is 257831087. The reversal of 257831055 is 550138752.

257831055 is a `hidden beast` number, since 2 + 578 + 31 + 0 + 55 = 666.

It is not a de Polignac number, because 257831055 - 2² = 257831051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257831051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2864745 + ... + 2864834.

It is an arithmetic number, because the mean of its divisors is an integer number (37242270).

Almost surely, 2^257831055 is an apocalyptic number.

257831055 is a deficient number, since it is larger than the sum of its proper divisors (189076185).

257831055 is a wasteful number, since it uses less digits than its factorization.

257831055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729590 (or 5729587 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 257831055 is about 16057.1185148519. The cubic root of 257831055 is about 636.4706895996.

It can be divided in two parts, 2578 and 31055, that added together give a palindrome (33633).

The spelling of 257831055 in words is "two hundred fifty-seven million, eight hundred thirty-one thousand, fifty-five".